Prison

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Game Description
The Prison is a special building located on the outskirts of your Wall that allows you to capture Heroes from other Empires with a Citadel level 15 or higher. Protect your Hero by building Wall upgrades, Traps and Barracks to provide more defense. You can hold captive Heroes for ransom by setting a Bounty or choose to release them to win favor with their owners. The whole time you keep a Hero captive in your Prison, you receive beneficial boosts! Once your Citadel is level 20, you can also choose to send imprisoned Heroes to the Banishment Portal and get rid of them for good.